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REC Alpha Pure vs TwinPeak 4 | Solar Panel Comparison

Updated: Nov 22, 2023

REC is known for producing high-quality solar panels, but which one is best for you

The REC Alpha Pure and TwinPeak 4 are both good-quality solar panels. We proudly recommend both to our customers and in fact, have been installing REC panels for more than 5 years. We’re totally confident in both panels’ performance, reliability, and longevity. 

How are they similar? Both panels feature a half-cut design, have an impressive 25 year product warranty, and are backed by a large company with a well-staffed and competent team in their Australian office.

What are the main points of difference? Price, efficiency, appearance and the type of cells. Read on for more information.


REC Alpha Pure

​REC TwinPeak 4

​132 cell half-cut solar panel

​120 cell half-cut solar panel


​385kW, 390kW, 395kW, 400kW, 405kW, 410kW

​360kW, 365kW, 370kW, 375kW


​25 years

​25 years


​92% at year 25

​86% at year 25





​20.8% – 22.2%

​19.7% – 20.5%





​1821 x 1016 x 30 mm

​1755 x 1040 x 30 mm




Key Differences


The Alpha Pure (max 22.2%) is more efficient compared to the TwinPeak 4 (max 20.5%). A higher efficiency = the more solar power it will produce per square metre. While the Alpha Pure has slightly higher efficiency, the TwinPeak 4 are still a highly efficient panel compared to others on the market. The Alpha Pure (0.25%) also have lower annual degradation compared to the TwinPeak 4 (0.50%) so the Alpha Pure panels will perform better year on year. 


The TwinPeak 4 panels are more affordable, yet still high-performing. They are an excellent value-for-money product. The Alpha Pure is a premium, top-of-the-range panel and their price tag reflects this. The REC Alpha Pure panels work out to be around $250 per kW extra – for a 6.6kW system, this equals around a $1500 difference (assuming all other components are the exact same).

Type of Cells

The Alpha Pure contains N-type cells while the TwinPeak 4 has P-Type cells. But what does that actually mean? N-type cells (like in the Alpha Pure) are usually more efficient and are not affected by light-induced degradation (LID). On the other hand, P-type cells (like in the TwinPeak 4) are more common & also more affordable. The downside to P-Type cells is they may get boron-oxygen defects, which can degrade the cells quicker and decrease efficiency. 


Alpha Pure has a sleek, all-black design. The standard TwinPeak 4 has visible silver “busbars” lines on the face of the panel. 


The Alpha Pure is ‘lead-free’ – this pretty much means that they are more sustainable.

FAQs about REC

What does the twin/half-cut design really mean?

The ‘Twin’ panel design is one of REC’s iconic design features. To keep it nice & simple, the panels are split into two, even sections. This reduces internal resistance which means:

  1. Higher energy yields*

  2. Continued energy production in shaded conditions*

  3. Increased reliability*

Both the TwinPeak 4 and the Alpha Pure have this ‘twin’ design. * Compared to a standard solar panel, according to REC.

Where are REC solar panels made?
How long have REC solar panels been around?
Why choose a certified REC Solar Professional?
Is REC a good solar company?

Got any questions? We’re here to help! Call our friendly team on 4637 2744 or email us at

At Electrical Sensations, we are proud to have been servicing Toowoomba and the Darling Downs since 2004. We are 100% committed to designing energy-saving solutions and installing high-quality equipment that will best meet your needs, in a manner that we are proud to put our name to. No cutting corners or compromising on quality, reliability or safety.

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